So I can't play 18W16A because I get a frozen client when I try it. I'm on Windows 10. All regular versions are fine, but when I try to play a snapshot, it's frozen. I can't click any buttons on the home screen. Additionally, when I close the window and reopen Minecraft, I get an error that I'm already logged in. According to Task Manager, when I try to close the frozen client, it doesn't actually close properly. Anyone else having this issue? How can I fix it? Thanks.

For those struggling with the term 'noise map', here is a really simple explanation.
Terrain generates in three distinct ways depending on the dimension. This is why The End always has floating islands above the void, even though it's always different. A noise map essentially tells the game that it can generate terrain in these areas. If you're older, you may remember in school, overhead projectors. The teachers would use sheets of cellophane type sheets with pictures on, and place them over the light, thus projecting the shadow of the picture onto the wall. This is kinda similar. The shadow, or 'noise map' is placed over the area and essentially shaded areas are mapped out to tell the game where blocks should and should generate. Each dimension has a different looking terrain, for example, the Nether is fully enclosed in bedrock.

Ant venom I found a glitch in Minecraft PE older version there are random tree stomps and a fallen birch tree log it seems very weird I don't know if you need the seed or not but the version is PE andthe seed is 85944247 but I don't think you can do it

AntVenom so what will happen to servers after the 1.13 update? I heard it will not be compatible anymore with the past versions, and most servers will now be forced to update. Can you make a video on that?

About the customized worlds thing, i believe that mojang can improve a lot world generation with json files (as was mentioned before), if they do it right it has the possibility to be even better than customized terrain + you could implement your own custom structures!

Maybe by removing the original custom world option, we might be able to customize this buffet mode even further, with things such as ore spawn rates. Maybe we could even make it so certain ores & structures will spawn in areas they originally couldn’t like a jungle temple in an ice spikes biome, or igloos in the desert

If they've truly, deliberately and permanently gotten rid of customized worlds, I'm not updating. I already hate the new command system they've moved to. Content be damned, unless they re-add customized worlds and fix the commands to at least some level of sense, I won't be updating. Mm-mm. I'll make the jump to modding.
I customize every single world I play for many different reasons. I LOVE being able to fool around with the game engine to see what it'll do if I fiddle with this or that, or laugh at the sheer absurdity I can cause by jacking ore spawns up to max, among other things. Losing that option is absolutely not outweighed by buffet mode. I well and truly hope this is temporary, 'cause if it isn't? I'll be yet another player to remain in one version permanently, and I honestly, truly do NOT want to do so. C'mon, man... Really?

**facepalm** They didn't removed the customized world, it's just hidden. You can customized the world with a json files. So, in a nutshell, it will no longer shows in the menu, but it'll come as a editable file.